Pawl-and-ratchet mechanism



(No Model.) 2 SheetsSheet 1.

L. J JONES. PAWL AND RATOHET MECHANISM.

No. 414,545. Patent-ed Nov. 5, 1889.

WI TN E 881 38 (No Model.) 2 SheetsSheet 2. L. J. JONES. PAWL AND RATCHET MEGHANISM.

Patented Nov. 5

.dttarney WITNESSES u PETERS. Prowl-MM. Wuh'mgtm u c.

a as shown.

UNITED STATES PATENT tries,

LEVI J. JONES, OF DALTON, llllASSACllUSETlTlS.

PAWL-AN D-VRATCH ET M ECHANISM.

SPECIFICATION forming" part of Letters Patent No. 414,545, dated November 5, 1889. Application filed October 15, 1887- Serial No. 252 A641 (No model.)

To aZZ wit-0122, it may concern.-

Beit known that I, LEVI J. JONES, a citizen of the United States of America, residing at Dalton, in the county of Berkshire and State of Massachusetts, have invented certain new and useful Improvements in Pawl-and- Ratchet Mechanism; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same, reference being had to the accompanying drawings, and to letters or figures of reference marked thereon, which form a part of this specification.

My invention relates to pawl-and-ratchet mechanism; and it consists in the construction and arrangements of the parts thereof,-

which will be more fully herein after described, and pointed out in the claim.

The object of my invention is to provide a pawl-andaatchet mechanism whereby extra power may be connected to shafting, the parts of the said mechanism being simple and effective in their construction and operation, strong and durable, easily mounted, and readily understood.

In the accompanying drawings, wherein like letters of reference indicate similar parts in the several views, Figure 1 is a vertical sectional view of my improved pawl-andratchet mechanism. Fig. 2 is a perspective view of the parts thereof removed. Fig. 3 is a side elevation of a non-continuous line of shafting, showing the application of my improved pawl-and-ratchet mechanism, which is illustrated in section.

A indicates the outer disk or shell of my improvement, which is formed with a central substantially-circular recess A, having a series of four recesses at extending into the shell A from the periphery of said central recess A. The one wall of each of the recesses Ct is in alignment with the four radii of the vertical and horizontal diameters of the shell A, the said recesses a being formed at right angles to said radii, and project backward therefrom,

.The Walls of the recesses a, farthest away from the said radii are curved and receive the rear curved ends of fiat slightly wedge-shaped pawls B, which are pivotally mounted at this point. Vertical recesses a are formed adjacent to the front walls of the recesses aand merge into the latter. Within the recesses a coiled springs S are mounted, which bear against the flat pawls B at their lower ends and against washerss at their upper ends. The said washers s are in adjustable engagcment with the lower ends of setscrews S, which project outward from the outer periphery of the shell A. The tension of the springs S against the pawls B may thus be regulated at will and as necessary.

lVithin the recess A a ratchet-wheel C- is adapted to be inserted. This ratchetwheel is constructed substantially circular and of the same diameter as the said recess A. Four angular shoulders are constructed in the periphery of said ratcl'iet-wheel to form. four teeth 0'', which are adapted to be engaged by the ends of the four pawls B. Suitable setcollars C and A are used with the ratchet wheel 0 and with the closed side of the casing A, which are secured to the opposing ends of the shafts with which my improvement is used. As shown in Fig. 1, the said ratchetwheel 0 fits snugly within the recess A of the shell A, and is adapted to be readily slipped in the said recess A when the pawland-ratchet mechanism is moved in connection. \Vhen the ratchet-wheel C is turned in the direction of arrow 1, the pawls l3 ride over the same, dropping into the teeth formed on the said ratchet'wheel. If an effort is made to move the ratchet-wheel in the direction of the arrow 2, such effort will be repelled by means of the engagement of the teeth G by the pawls B, which are held down against the teeth by the action of the springs S. It will be observed that resistance of movement of the ratchet-wheel in the direction of the arrow 2 is applied from four points only. These points of resistance intersect the vertical and horizontal diameters of the wheel C, having a thickness of metal between the same capable of overcoming the strain brought to bear thereagainst. It will thus be seen that a strong and durable clutch is provided.

The utility, adaptability, and advantages of my improved form of pawl-and-ratchet mechanism being obviously apparent, it is unnecessary to further enlarge upon the same herein.

Having thus described my invention, what I claim as new, and desire to secure by Letters Patent, is a The combination of the casing A, having a central circular chamber, the outer peripheral portion of said casing provided on its inner wall with tangentially extending pawl recesses and substantially-radial recesses intersecting the same, the pawls pivoted in said pawl recesses, adjusting screws passing through said peripheral portion to intersect the radial recesses therein, a plate located at the end of each screw, and a spring interposcd'between the adjacent pawl and plate,

and the block 0, fitting snugly within the chamber and having tangential recesses corresponding in number to that of the pawls, the relative arrangement of the casing and block 0 being such that intermediateconcentric bearing portions are formed between the pawl-recesses of both, substantially as described.

In testimony whereofI aifix my signaturein presence of two Witnesses.

LEVI J. JONES. Vitnesses:

HOMER H. BICKNELL, W. W. Scormpn. 

